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Finding the Fourth Proportional to 665,010.74, 997,656.39 and 215,696.72

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Solution

The fourth proportional to 665,010.74, 997,656.39 and 215,696.72 is: 323,590.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,010.74 : 997,656.39 = 215,696.72 : x
  2. Step 2: Convert to fraction form
    665,010.74/997,656.39 = 215,696.72/x
  3. Step 3: Cross multiply
    665,010.74x = 997,656.39 × 215,696.72
  4. Step 4: Simplify right side
    665,010.74x = 215,191,211,010.04
  5. Step 5: Solve for x
    x = 215,191,211,010.04/665,010.74
  6. Step 6: Final answer
    x = 323,590.58

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.